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FAN6103 — Power Supply Supervisor Plus PWM
October 2009
FAN6103
Power Supply Supervisor Plus PWM
Features
PC Half-Bridge Power Supply Supervisor Plus
PWM
High Integration, Few External Components
Over-Voltage Protection for 3.3V, 5V, and 12V
Under-Voltage Protection for 3.3V, 5V, and 12V
Under-Voltage protection for –12V and/or –5V
Over-Power and Short-Circuit Protection
Power-Down Warning Circuitry
Power-Good Circuitry
Delay Time for PSON and PG Signal
Remote ON/OFF Function
On-Chip Oscillator and Error Amplifier
Latching PWM for Cycle-By-Cycle Switching
Push-Pull PWM Operation and Totem-Pole Outputs
Soft-Start and Maximum 93% Duty Cycle
Description
FAN6103 controller is designed for switching mode
power supply for desktop PCs. It provides all the
functions necessary to monitor and control the output of
the power supply. Remote ON/OFF control, power good
circuitry, and protection features against over-voltage
and over-power are implemented. It directly senses all
the output rails for OVP without the need of external
dividers. An innovated AC-signal sampling circuitry
provides a sufficient power-down warning signal for PG.
A built-in timer generates accuracy timing for control
circuit, including the PS-off delay. The cycle-by-cycle
PWM switching prevents the power transformer from
saturation and ensures the fastest response for the
short-circuit protection, which greatly reduces the stress
for power transistors.
Utilizing minimum external components, the FAN6103
includes all of the functions for push-pull and/or half-
bridge topology, decreasing the production cost and
PCB space, while increasing the mean time between
failures for power supply
Applications
Desktop PC Power Supply
Ordering Information
Part Number
FAN6103NZ
Operating
Temperature Range
-40°C to +105°C
Eco Status
RoHS
Package
16-Pin Dual Inline Package (DIP)
Packing
Method
Tube
For Fairchild’s definition of Eco Status, please visit:
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